Home / 1,215.60-1,822.58-484.80

Finding the Fourth Proportional to 1,215.60, 1,822.58 and 484.80

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Solution

The fourth proportional to 1,215.60, 1,822.58 and 484.80 is: 726.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,215.60 : 1,822.58 = 484.80 : x
  2. Step 2: Convert to fraction form
    1,215.60/1,822.58 = 484.80/x
  3. Step 3: Cross multiply
    1,215.60x = 1,822.58 × 484.80
  4. Step 4: Simplify right side
    1,215.60x = 883,586.78
  5. Step 5: Solve for x
    x = 883,586.78/1,215.60
  6. Step 6: Final answer
    x = 726.87

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.